Projectile nose structure



Oct. 24, 1961 G. A. HARADEN 3,005,407

PROJECTILE NOSE STRUCTURE Filed May 26, 1944 )NVENTOR GEDRE ALBERT HARADE/V BY m " ATTORNEY te StatesEeE form of a castellated crown 30. A coil form 24 is fitted 3,005,407 over the collar 30 and projects from one end of the PROJECTILE NOSE STRUCTURE George Albert Haraden, Silver Spring, Md., assignor to the United States of America as represented by the Secretary of the Navy Filed May 26, 1944, Ser. No. 537,466 3 Claims. (Cl. 102-70.2)

This invention relates generally to electrically deto nated projectiles and more particularly to an improved nose assembly for such projectiles.

One of the principal objects of the invention is to provide a projectile nose assembly incorporating radio actuated proximity firing means supported and arranged in a novel manner and employing a unique mounting spider which functions to retain the electric components of the assembly in a compact and rigid unit.

Another object of the invention is to provide a structure of the indicated character which is simple to construct in large volume production and with reliable uniformity of dimensions and characteristics.

Still another object is to provide such a structure which greatly facilitates the assembly of electrically detonated projectiles.

A further object of the invention is to provide projectile nose structure having a unitary plastic internal supporting spider which may be molded in one piece.

Further objects of the invention will be apparent upon consideration of this disclosure in its entirety.

In the drawing:

FIG. 1 is a perspective view of a projectile nose assembly constructed in accordance with the present in vention;

FIG. 2 is a longitudinal sectional view thereof;

FIG. 3 is an exploded perspective view of the internal components;

FIGS. 4 and 5 are cross sections taken substantially on the lines 4-4 and 5-5 respectively of FIG. 2, and looking in the direction of the arrows, the electrical components being omitted to afford a 'better view of the structural features.

Referring now to the drawing, the body of the projectile nose, generally designated 1, is formed of molded plastic, as a relatively thick-walled shell having a generally conical nose portion 2 and a generally cylindrical rear portion 3. The chamber formed by the hollow interior is designated 4, a plurality of longitudinal grooves 5 being provided in the chamber Wall, for a purpose which will presently appear. Exteriorly mounted upon the conical nose portion 2 is a metallic antenna formed as a sheet metal .cap 6, molded in place and electrically connected with the components within the chamber 4. Mechanical interlock between the cap 6 and body 2 is assisted by the inturned tongues 6A pressed from the body.

The main supporting means for the internal components comprises a spider 8, formed of lucite or other suitable plastic material and having an axially disposed cylindrical opening 9, and radially extending ribs 10, 11, 12 positioned and proportioned to slide into the grooves 5 when the spider is fitted into the chamber 4, in the manner shown in FIGS. 2 and 4. Between the ribs of the spider are longitudinal channels 13, 14, 15, 16, 17, 18. At one end the spider is formed with a collar in the spider. The slots as 31 in the collar extend downwardly farther than the coil form, to permit wires to extend therethrough from the exterior to the central opening 9.

The assembly of spider and coil form serves as a complete support for the components of a radio frequency oscillator. The vacuum tube 33 of the oscillator is housed in the central opening 9 and is preferably cushioned by a rubber sleeve 34. Other components are arranged in the channels 13, 14, 15, 16, 17, 18. components include fixed condenser 19, resistors 20 and 21 and choke coils 22, 23. The electrical connections for such an oscillator are well known and form no part of the present invention. They will accordingly not be described in detail here.

The oscillator coil, the wire of which is designated 26, is wound about the form 24 and connected to the antenna by aconductor 26 which may be a continuation thereof and extends through the bore 7. Connections between the tube 33 and the components on the spider are led through the slots 31.

In assembling the nose structure the spider and coil assembly, with all of the oscillator components mounted and wired, is placed in the recess 4, the wire 26 being projected through an opening 37 in the antenna cap which aligns with opening 7 in the body, and soldered to the cap as shown. In order to insert the spider it is necessary to engage the ribs 10, 11, and 12 in the grooves 5. Inasmuch as'the ribs are spaced unequally, and the grooves 5 are arranged similarly to receive them, the spider may only be inserted in the recess in one position. The parts are thus so keyed that it is impossible to assemble them improperly, while the engagement of the ribs in the grooves 5 provides a rigidity which precludes the possibility of displacement of these parts.

In order to retain the assembly in the recess I provide a bottom plate 25 which may be pinned to the base of the body section 1. After assembly of the parts in the manner described, a suitable potting compound is poured into the chamber to rigidly hold all of the parts against relative displacement.

I claim:

1. In a radio proximity fuze, projectile nose structure having a body formed with a receess, an antenna mounted on the body at its forward end, said body having an aperture providing communication between the recess and the antenna and having a groove opening into the recess, a spider having a tongue engageable in the groove, electromagnetic wave generating means carried by the spider and including coil supporting means in the recess, a coil on said supporting means connected with the antenna through said aperture, and means closing the body at its rear end.

2. In a radio proximity fuze, projectile nose structure comprising a concentric hollow insulating body having an axial opening in one end thereof communicating with said hollow interior, a skeletonized internal support also formed of insulating material and insertable in the body through said opening, mechanically interengageable portions carried by said body and said support interlockable Such References Cited in the file of this patent UNITED STATES PATENTS Varaud Sept. 13, 1927 Ruhlemann May 17, 1932 Ferrel Sept. 9, 1941 Wales July 9, 1946 FOREIGN PATENTS Sweden Feb. 24, 1938 

